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Clinical and Vaccine Immunology, October 2008, p. 1541-1546, Vol. 15, No. 10
1071-412X/08/$08.00+0     doi:10.1128/CVI.00141-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Immunomagnetic Separation and Coagglutination of Vibrio parahaemolyticus with Anti-Flagellar Protein Monoclonal Antibody{triangledown}

S. Datta,1 M. E. Janes,1 and J. G. Simonson2*

Department of Food Science,1 Department of Agricultural Chemistry, Louisiana State University AgCenter, Baton Rouge, Louisiana 708032

Received 26 March 2008/ Returned for modification 13 June 2008/ Accepted 15 August 2008

Mice were immunized by injection of Vibrio parahaemolyticus ATCC 17802 polar flagellin in order to produce monoclonal antibodies (mAbs). mAbs were analyzed by anti-H enzyme-linked immunosorbent assay using V. parahaemolyticus polar flagellar cores. The mAb exhibiting the highest anti-H titer was coated onto Cowan I Staphylococcus aureus cells at a concentration of 75 µg/ml cell suspension and used for slide coagglutination. Of 41 isolates identified genetically as V. parahaemolyticus, 100% coagglutinated with the anti-H mAb within 30 s, and the mAb did not react with 30 isolates identified as Vibrio vulnificus. A strong coagglutination reaction with V. parahaemolyticus ATCC 17802 was still observed when the S. aureus cells were armed with as little as 15 µg of mAb/ml S. aureus cell suspension. At this concentration, the mAb cross-reacted with three other Vibrio species, suggesting that they share an identical H antigen or antigens. The anti-H mAb was then used to optimize an immunomagnetic separation protocol which exhibited from 35% to about 45% binding of 102 to 103 V. parahaemolyticus cells in phosphate-buffered saline. The mAb would be useful for the rapid and selective isolation, concentration, and detection of V. parahaemolyticus cells from environmental sources.


* Corresponding author. Mailing address: 102 Agricultural Chemistry Building, Highland Road, LSU, Baton Rouge, LA 70803. Phone: (225) 342-5812. Fax: (225) 342-0027. E-mail: jsimonson{at}agctr.lsu.edu

{triangledown} Published ahead of print on 27 August 2008.


Clinical and Vaccine Immunology, October 2008, p. 1541-1546, Vol. 15, No. 10
1071-412X/08/$08.00+0     doi:10.1128/CVI.00141-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.